US3080001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter
Assignee: Lockheed Martin Corp
•
Filing: 1959-10-07
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Granted: 1963-03-05
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Expires: 1979-10-07
Abstract
No abstract record available.
Inventors
- 👤 Irven H Culver
- 👤 Donald E Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:16
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/22; B64C27/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A HELICOPTER INCLUDING A ROTARY WING ROTATABLE IN A SUBSTANTIALLY HORIZONTAL PLANE TO PROVIDE LIFT COMPRISED OF: A ROTOR HAVING ONE OR MORE SETS OF OPPOSED BLADE FIXED WITH RESPECT TO EACH OTHER, MEANS TO PREVENT MOVEMENT OF EACH SET OF SAID OPPOSED BLADES ABOUT ITS TRANSVERSE AXIS, MEANS TO OSCILATE SAID SET OF BLADES ABOUT ITS LONGITUDINAL AXIS, RELATIVELY SHORT ARMS FIXED RIGIDLY TO EACH SET OF SAID ROTOR BLADES AND EXTENDING TRANSVERSELY THERETO SUBSTANTIALLY IN ITS PLANE OF ROTATION, AERODYNAMIC SURFACES ON THE EXTREME ENDS OF SAID ARMS HAVING A POSITIVE PITCH IN THE DIRECTION OF ROTATION OF SAID ROTOR AND MEANS TO ROTATE SAID ROTOR.
Claim 2
Dependent Claim
108 words
A HELICOPTER INCLUDING A ROTARY WING ROTATABLE IN A SUBSTANTIALLY HORIZONTAL PLANE TO PROVIDE LIFT COMPRISED OF: A ROTOR HAVING ONE OR MORE SETS OF OPPOSED BLADE FIXED WITH RESPECT TO EACH OTHER, MEANS TO PREVENT MOVEMENT OF EACH SET OF SAID OPPOSED BLADES ABOUT ITS TRANSVERSE AXIS, MEANS TO OSCILATE SAID SET OF BLADES ABOUT ITS LONGITUDINAL AXIS, RELATIVELY SHORT ARMS FIXED RIGIDLY TO EACH SET OF SAID ROTOR BLADES AND EXTENDING TRANSVERSELY THERETO SUBSTANTIALLY IN ITS PLANE OF ROTATION, AERODYNAMIC SURFACES ON THE EXTREME ENDS OF SAID ARMS HAVING A POSITIVE PITCH IN THE DIRECTION OF ROTATION OF SAID ROTOR AND MEANS TO ROTATE SAID ROTOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |